Telephone Service The percent P of the households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model P = - 3.42 + 1.297 t ln t , 5 ≤ t ≤ 14 where t represents the year, with t = 5 corresponding to 2005. ( Source: National Center for Health Statistics ) (a) Approximate the percents of households with wireless-only telephone service in 2008 and 2012. (b) Use a graphing utility to graph the function. (c) Can the model be used to predict the percent of households with wireless-only telephone service in 2020? in 2030? Explain.
Telephone Service The percent P of the households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model P = - 3.42 + 1.297 t ln t , 5 ≤ t ≤ 14 where t represents the year, with t = 5 corresponding to 2005. ( Source: National Center for Health Statistics ) (a) Approximate the percents of households with wireless-only telephone service in 2008 and 2012. (b) Use a graphing utility to graph the function. (c) Can the model be used to predict the percent of households with wireless-only telephone service in 2020? in 2030? Explain.
Solution Summary: The author explains how the graph of the function P=-3.42+1.297tmathrmlnt,5le t
Telephone Service The percent
P
of the households in the United States with wireless-only telephone service from 2005 through 2014 can be approximated by the model
P
=
-
3.42
+
1.297
t
ln
t
,
5
≤
t
≤
14
where
t
represents the year, with
t
=
5
corresponding to 2005. (Source: National Center for Health Statistics)
(a) Approximate the percents of households with wireless-only telephone service in 2008 and 2012.
(b) Use a graphing utility to graph the function.
(c) Can the model be used to predict the percent of households with wireless-only telephone service in 2020? in 2030? Explain.
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